On 19/03/2023 20:42, Diogo Ivo wrote:
> Add the reserved-memory regions of the nominal and derated tables setup by
> the bootloader so that the EMC frequency change code can access them.
>
> Signed-off-by: Diogo Ivo <diogo.ivo@xxxxxxxxxxxxxxxxxx>
> ---
> arch/arm64/boot/dts/nvidia/tegra210-smaug.dts | 21 +++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
> index 709f3f417a19..a74826ae97b4 100644
> --- a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
> +++ b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
> @@ -30,6 +30,22 @@ memory {
> reg = <0x0 0x80000000 0x0 0xc0000000>;
> };
>
> + reserved-memory {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + nominal: emc-table@f67cc000 {
> + compatible = "nvidia,tegra210-emc-table";
> + reg = <0x0 0xf67cc000 0x0 0xbea0>;
> + };
> +
> + derated: emc-table@f67d7ea0 {
> + compatible = "nvidia,tegra210-emc-table";
> + reg = <0x0 0xf67d7ea0 0x0 0xbea0>;
> + };
> + };
> +
> host1x@50000000 {
> dc@54200000 {
> status = "okay";
> @@ -1735,6 +1751,11 @@ pmc@7000e400 {
> status = "okay";
> };
>
> + emc: external-memory-controller@7001b000 {
Node names should be generic, so memory-controller.
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation
Check your code for warnings (dtc, dtbs_check). Node with unit address
requires reg or ranges.
Best regards,
Krzysztof
